Sorry for the troubles you are having with uTool2. We will look into the import problems with the MAC version you have.
In the meantime, could you try with uTool version 1, which is available on the downloads site.
It is true that the songs are recorded into poly-wav files but each file is restricted to 2GB (around 10 mins of recording). You can open them with DAW’s that support these files.
However with 1.5 hours of recording, you will have around 10-15 2GB poly-wav files that you will have to align manually.